keyword
https://read.qxmd.com/read/37956523/sulphate-reduction-mixed-sulphide-and-thiosulphate-driven-autotrophic-denitrification-nitrification-and-anammox-sania-integrated-process-for-sustainable-wastewater-treatment
#21
JOURNAL ARTICLE
Chu-Kuan Jiang, Yang-Fan Deng, Zou Xu, Buddhima Siriweera, Di Wu, Guang-Hao Chen
This study proposes the Sulphate reduction, mixed sulphide- and thiosulphate-driven Autotrophic denitrification, Nitrification, and Anammox integrated (SANIA) process for sustainable treatment of mainstream wastewater after organics capture. Three moving-bed biofilm reactors (MBBRs) were applied for developing sulphate reduction (SR), mixed sulphide- and thiosulphate-driven partial denitrification and Anammox (MSPDA), and NItrification (N), respectively. Typical mainstream wastewater after organics capture (e...
November 3, 2023: Water Research
https://read.qxmd.com/read/37949290/optimization-of-moving-bed-biofilm-reactors-for-the-treatment-of-municipal-wastewater
#22
JOURNAL ARTICLE
Vinay Pratap, Rakesh Kumar, Sunil Kumar, Bholu Ram Yadav
The properties of biocarriers significantly influence the performance of a moving bed-biofilm reactor (MBBR). This study aimed to assess the impact of media type, filling ratio, and hydraulic retention time (HRT) on biofilm formation and MBBR performance in both batch and continuous setups using real municipal wastewater. Two different media, high-density polyethylene (HDPE) and polypropylene (PPE), with varying surface area and properties were used. Biofilm growth and MBBR performance were monitored and optimized using response surface methodology...
November 8, 2023: Environmental Research
https://read.qxmd.com/read/37936048/a-pilot-scale-snad-mbbr-process-for-treating-anaerobic-digester-liquor-of-swine-wastewater-performance-and-microbial-community
#23
JOURNAL ARTICLE
Liang Zhou, Fangzheng Guo, Yongwei Jiang, Weijing Liu, Fangang Meng, Chao Wang
In this pilot-scale study, simultaneous partial nitrification, anammox, and denitrification (SNAD) process was achieved successfully in a moving bed biofilm reactor (MBBR) for treating anaerobic digester liquor of swine wastewater. After 95 days of operation, when the total nitrogen loading rate of SNAD-MBBR process was 1.09 kg TN/m3 /day, the total nitrogen removal rate could reach 0.87 kg TN/m3 /day, and the removal efficiencies of ammonium and total nitrogen were 92.0% and 79.7%, respectively...
November 8, 2023: Environmental Science and Pollution Research International
https://read.qxmd.com/read/37918070/microbial-biofilm-metabolization-of-benzalkonium-compounds-benzyl-dimethyl-dodecyl-ammonium-benzyl-dimethyl-tetradecyl-ammonium-chloride
#24
JOURNAL ARTICLE
Yrsa Larsson, Andrea Mongelli, Vaidotas Kisielius, Kai Bester
Benzalkonium chlorides (BACs) are quaternary ammonium compounds (QUATs) that are used as biocides. The degradation of these compounds in wastewater treatment plants is essential to reduce their spread into the environment and thus prevent the development of QUAT-resistant genes. The biodegradation of two BACs (BAC-12 and BAC-14) was investigated in moving bed biofilm reactors (MBBRs). Degradation half-lives of 12 and 20 h for BAC-12 and - 14, respectively, were detected as well as the formation of 42 metabolites...
October 28, 2023: Journal of Hazardous Materials
https://read.qxmd.com/read/37909408/comparing-biofilm-reactors-inoculated-with-shewanella-for-decolorization-of-reactive-black-5-using-different-carrier-materials
#25
JOURNAL ARTICLE
Yumin Zheng, Haihong Song, Qianfei Chen, Yayi Hou, Xinxin Zhang, Songlei Han
This study assessed the performance of biofilm reactors inoculated with azo dye degrading Shewanella for the decolorization of Reactive Black 5 (RB5), using three different carrier materials, namely almond shell biochar, moving bed biofilm reactor (MBBR), and polypropylene carrier (PPC). The reactors were fed with low-nutrient artificial wastewater containing RB5, and all three carriers showed good RB5 decolorization performance, with varying efficiencies. Liquid Chromatography-Mass Spectrometry analysis revealed distinct RB5 degradation pathways associated with each carrier, influenced by carrier materials and microbial communities...
November 1, 2023: Biotechnology Journal
https://read.qxmd.com/read/37839187/effect-of-antibiotics-on-the-performance-of-moving-bed-biofilm-reactor-for-simultaneous-removal-of-nitrogen-phosphorus-and-copper-ii-from-aquaculture-wastewater
#26
JOURNAL ARTICLE
Ying Cao, Ruiheng Huang, Tenghao Li, Dandan Pan, Sicheng Shao, Xiangwei Wu
Co-existence of NO3 - -N, antibiotics, phosphorus (P), and Cu2+ in aquaculture wastewater has been frequently detected, but simultaneous removal and relationship between enzyme and pollutants removal are far from satisfactory. In this study, simultaneous removal of NO3 - -N, P, antibiotics, and Cu2+ by moving bed biofilm reactor (MBBR) was established. About 95.51 ± 3.40% of NO3 - -N, 61.24 ± 3.51% of COD, 18.74 ± 1.05% of TP, 88% of Cu2+ were removed synchronously in stage I, and antibiotics removal in stages I-IV was 73...
October 13, 2023: Ecotoxicology and Environmental Safety
https://read.qxmd.com/read/37748343/simultaneous-methanogenesis-and-denitrification-in-an-anaerobic-moving-bed-biofilm-reactor-for-landfill-leachate-treatment-ameliorative-effect-of-rhamnolipids
#27
JOURNAL ARTICLE
Zi Song, Runfeng Liao, Xinbo Zhang, Xiaoli Su, Mingming Wang, Haojie Zeng, Wenyi Dong, Feiyun Sun
In this study, an anaerobic moving bed biofilm reactor (AnMBBR) was developed for simultaneous methanogenesis and denitrification (SMD) to treat high-strength landfill leachate for the first time. A novel strategy using biosurfactant to ameliorate the inhibition of landfill leachate on the SMD performance was proposed and the underlying mechanisms were explored comprehensively. With the help of rhamnolipids, the chemical oxygen demand (COD) removal efficiency of landfill leachate was improved from 86.0% ± 2...
September 19, 2023: Water Research
https://read.qxmd.com/read/37743451/characterization-of-the-microbial-community-and-prediction-of-metabolic-functions-in-an-anaerobic-oxic-system-with-magnetic-micropolystyrene-as-a-biocarrier
#28
JOURNAL ARTICLE
Fengyuan Zhang, Ying Chen, Xiaoshuang Shi, Mingyi Lu, Kang Qin, Fan Qin, Rongbo Guo, Quan Feng
Polystyrene (PS) and magnetic polystyrene (MPS) materials have been used extensively in wastewater treatment. In this research, a 55-day anaerobic/oxic process was carried out to evaluate the effects of PS and MPS on microorganisms under aerobic and anaerobic conditions. Scanning electron microscopy results revealed differences in the entanglement state of the sludge with the biocarrier due to differences in surface morphology. High-throughput sequencing analysis showed that the microbial communities differed considerably in the presence of PS and MPS addition under both aerobic and anaerobic conditions...
September 25, 2023: Environmental Science and Pollution Research International
https://read.qxmd.com/read/37741580/evaluation-of-commercial-moving-bed-media-and-sugarcane-bagasse-as-packing-material-in-biotrickling-filter-for-hydrogen-sulfide-removal
#29
JOURNAL ARTICLE
Kanathip Promnuan, Sureewan Sittijunda, Alissara Reungsang
This study compared two biotrickling filter packing materials for hydrogen sulfide removal. Inlet H2 S concentrations and empty-bed retention time were tested on the two biotrickling filters. First reactor (BT1) had immobilized sulfur-oxidizing bacteria on commercial moving-bed media, whereas second reactor (BT2) had sulfur-oxidizing bacteria on sugarcane bagasse. The study found that BT1 performed best at 120 s empty-bed retention time, 422.39 g/m3 ·h hydrogen sulfide loading rate, resulted in 416 g/m3 ·h hydrogen sulfide elimination capacity...
September 21, 2023: Bioresource Technology
https://read.qxmd.com/read/37741365/machine-learning-model-optimization-for-removal-of-steroid-hormones-from-wastewater
#30
JOURNAL ARTICLE
Farzaneh Mohammadi, Zeinab Yavari, Mohammad Reza Nikoo, Ali Al-Nuaimi, Hossein Karimi
In the past few decades, there has been a significant focus on detecting steroid hormones in aquatic environments due to their influence on the endocrine system. Most compounds of these pollutants are the natural steroidal estrogens, i.e., estrone (E1), 17β-Estradiol (E2), and the synthetic estrogen 17α-Ethinylestradiol (EE2). The Moving-Bed Biofilm Reactor (MBBR) technique is appropriate for eliminating steroid hormones. This study centers on creating a model to estimate the effectiveness of the MBBR system regarding its ability to eliminate E1, E2, and EE2...
September 21, 2023: Chemosphere
https://read.qxmd.com/read/37717325/effect-of-biofilm-thickness-on-the-activity-and-community-composition-of-phosphorus-accumulating-bacteria-in-a-moving-bed-biofilm-reactor
#31
JOURNAL ARTICLE
Rellegadla Sandeep, Juan Franco Muscolino, Williane Vieira Macêdo, Maria Piculell, Magnus Christensson, Jan Struckmann Poulsen, Jeppe Lund Nielsen, Leendert Vergeynst
Can biofilms enhance the rates of phosphorus removal in wastewater treatment? In order to narrow the scientific gap on the effect of biofilm thickness on the activity and microbial community of phosphorus-accumulating bacteria, this study investigated biofilms of 30 to 1000 µm thickness in a moving bed biofilm reactor. Measurements on 5 different biofilm carriers showed that biomass-specific phosphorus release and uptake rates increased as a function of biofilm thickness for biofilms thinner than about 110 µm but were lower for thicker biofilms of about 550-1000 µm...
September 9, 2023: Water Research
https://read.qxmd.com/read/37705672/integrated-treatment-of-per-and-polyfluoroalkyl-substances-in-existing-wastewater-treatment-plants-scoping-the-potential-of-foam-partitioning
#32
JOURNAL ARTICLE
Sanne J Smith, Chantal Keane, Lutz Ahrens, Karin Wiberg
Foam fractionation is becoming increasingly popular as a treatment technology for water contaminated with per- and polyfluoroalkyl substances (PFAS). At many existing wastewater treatment facilities, particularly in aerated treatment steps, foam formation is frequently observed. This study aimed to investigate if foam fractionation for the removal of PFAS could be integrated with such existing treatment processes. Influent, effluent, water under the foam, and foam were sampled from ten different wastewater treatment facilities where foam formation was observed...
September 8, 2023: ACS ES T Eng
https://read.qxmd.com/read/37690201/biotransformation-of-micropollutants-in-moving-bed-biofilm-reactors-under-heterotrophic-and-autotrophic-conditions
#33
JOURNAL ARTICLE
Navid Ahmadi, Mona Abbasi, Ali Torabian, Mark C M van Loosdrecht, Joel Ducoste
We investigated the transformation of four pharmaceuticals (Diclofenac, Naproxen, Ibuprofen and Carbamazepine) in a moving bed biofilm reactor subjected to different COD/N ratios in four experimental phases. The shift from medium to high range COD/N ratio (i.e., 5:1 to 100:1) intensified the competition between heterotrophs and nitrifying communities, leading to a transition from co-existence of heterotrophic and autotrophic conditions with high COD removal and nitrification rate in phase I to dominant heterotrophic conditions in phase II...
August 6, 2023: Journal of Hazardous Materials
https://read.qxmd.com/read/37683385/enhanced-denitrification-of-the-ao-mbbr-system-used-for-expressway-service-area-sewage-treatment-a-new-perspective-on-decentralized-wastewater-treatment
#34
JOURNAL ARTICLE
Xin Xing, Xin Yuan, Yu Zhang, Cong Men, Zhuowei Zhang, Xiaoying Zheng, Dong Ni, Huatian Xi, Jiane Zuo
Decentralized wastewater treatment warrants considerable development in numerous countries and regions. Owing to the unique characteristics of high ammonia nitrogen concentrations and low carbon/nitrogen ratio, nitrogen removal is a key challenge in treating expressway service area sewage. In this study, an anoxic/oxic-moving bed biofilm reactor (A/O-MBBR) and a traditional A/O bioreactor were continuously operated for 115 days and their outcomes were compared to investigate the enhancement effect of carriers on the total nitrogen removal (TN) for expressway service area sewage...
September 6, 2023: Journal of Environmental Management
https://read.qxmd.com/read/37669734/mathematical-modelling-and-comparative-analysis-of-treatment-technologies-for-upgrading-wastewater-treatment-plants-a-case-study-of-biofilm-reactors-in-el-gouna-egypt
#35
JOURNAL ARTICLE
Ashrakat Osama, Mohab A Kinnawy, Moustafa S Moussa, Carsten Riechelmann, Hadeel Hosney
In recent years, Moving Bed Biofilm Reactors (MBBRs) have been preferred to conventional processes with suspended biomass. The main reason for this preference is that it can achieve better removal efficiencies than conventional systems with smaller footprints. However, unlocking the full potential of MBBRs in large-scale WWTPs remains challenging in real life. In this study, the performance of three different treatment technologies, Extended Aeration Activated Sludge (EAAS), Hybrid Fixed Bed Biofilm Reactor (HFBBR), and Hybrid Moving Bed Biofilm Reactor (HMBBR), was investigated over a year in a WWTP located in El-Gouna, Egypt...
September 3, 2023: Environmental Research
https://read.qxmd.com/read/37642854/stigmasterol-removal-by-an-aerobic-treatment-system
#36
JOURNAL ARTICLE
Soledad Chamorro, Claudia Xavier, Gladys Vidal
Stigmasterol is a phytosterol contained in kraft mill effluent that is able to increase over 100% after aerobic biological treatment. This compound can act as an endocrine disrupter as its structure is similar to that of cholesterol. Furthermore, stigmasterol contained in kraft mill effluent shows high toxicity (25-fold more than β-sitosterol) to aquatic organisms such as Daphnia magna. However, the operation of the aerobic treatment and biomass adaptation could be affecting their removal. The performances of activated sludge (AS), aerated lagoon (AL), and moving bed biofilm reactors (MBBR) are compared to remove the stigmasterol contained in kraft mill effluent...
2023: Methods in Molecular Biology
https://read.qxmd.com/read/37623751/improvement-of-mbbr-mbr-performance-by-the-addition-of-commercial-and-3d-printed-biocarriers
#37
JOURNAL ARTICLE
Dimitra C Banti, Petros Samaras, Eleni Kostopoulou, Vassiliki Tsioni, Themistoklis Sfetsas
Moving bed biofilm reactor combined with membrane bioreactor (MBBR-MBR) constitute a highly effective wastewater treatment technology. The aim of this research work was to study the effect of commercial K1 biocarriers (MBBR-MBR K1 unit) and 3D-printed biocarriers fabricated from 13X and Halloysite (MBBR-MBR 13X-H unit), on the efficiency and the fouling rate of an MBBR-MBR unit during wastewater treatment. Various physicochemical parameters and trans-membrane pressure were measured. It was observed that in the MBBR-MBR K1 unit, membrane filtration improved reaching total membrane fouling at 43d, while in the MBBR-MBR 13X-H and in the control MBBR-MBR total fouling took place at about 32d...
July 25, 2023: Membranes
https://read.qxmd.com/read/37574084/assessment-of-hybrid-fixed-and-moving-bed-biofilm-applications-for-wastewater-treatment-capacity-increase-in-situ-tests-in-el-gouna-wwtp-egypt
#38
JOURNAL ARTICLE
Carsten Riechelmann, Mahmoud M Habashy, Eldon R Rene, M S Moussa, Hadeel Hosney
This paper provides a procedure for comparing the performance of different biofilm carrier medias and their surrounding suspended biomass through oxygen uptake rate (OUR) tests. For in situ OUR measurements three identical lab scale biofilm reactors were set up at the El Gouna wastewater treatment plant (WWTP). In this setup two options of media for moving-bed biofilm reactors (MBBR) and one media for fixed-bed biofilm reactors (FBBR) were compared. The WWTP also used the same carrier in a real scale hybrid application to analyze how the interactions between the carrier type and the suspended biomass influences the overall performance...
August 11, 2023: Chemosphere
https://read.qxmd.com/read/37522440/spatiotemporal-succession-of-phosphorous-accumulating-biofilms-during-the-first-year-of-establishment
#39
JOURNAL ARTICLE
Didrik Villard, Inger Andrea Nesbø Goa, Inga Leena Angell, Sondre Eikaas, Torgeir Saltnes, Wenche Johansen, Knut Rudi
Many wastewater treatment plants are dependent on the utilization of microorganisms in biofilms. Our knowledge about the establishment of these biofilms is limited, particular with respect to biofilms involved in enhanced biological phosphorus removal (EBPR). These biofilms rely on polyphosphate-accumulating organisms (PAOs), requiring alternating oxic and anaerobic conditions for phosphorous uptake. This challenge has been solved using the Hias process, which combines moving-bed biofilm-reactor (MBBR) technology with physical transfer of biofilm-carriers from oxic to anaerobic zones...
July 2023: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://read.qxmd.com/read/37506947/new-perspective-on-effect-of-%C3%AE-cyclodextrin-on-nitrification-denitrification-and-denitrification-phosphorus-removal-in-biogenic-manganese-oxides-driven-moving-bed-biofilm-reactor-performance-evaluation-microbial-community-and-process
#40
JOURNAL ARTICLE
Sicheng Shao, Mengcheng Sheng, Yingzi Ye, Chunxiao Wang, Dandan Pan, Xiangwei Wu
Effect of β-cyclodextrin (β-CD) on simultaneous removal of NH4 + -N, NO3 - -N, COD, and phosphorus (P) in biogenic manganese oxides (BioMnOx) driven moving bed biofilm reactor (MBBR) was investigated. 58.64% and 86.32%, 79.65% and 98.39%, 62.45% and 97.30%, and 24.80% and 95.90% of TN and COD were removed in phases I-IV, indicating that simultaneous nitrification and denitrification (SND) efficiencies were 75.44%, 83.91%, 72.71%, and 35.83%, respectively. Composition and fluorescence spectral characteristics of extracellular polymeric substance (EPS) were evaluated including the removal kinetics of TN and COD...
July 26, 2023: Bioresource Technology
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